Superheater for steam-generators.



W. F. KIESEL, JR. SUPBRHEATER FOR STEAM GENERATORS.

APPLICATION FILED JAN.9,1911.

1,06 1 1 80. Patented May 6, 1913.

2 SHEETSSHEBT 1.

WITNE ES: INVENTOR WWW BY W. P. KIESEL, JR. SUPERHEATER FOR STEAM GENERATORS.

Patented May 6, 1913.

2 S [ITS-SHEET 2 INVENTUR 1mm Q: Saw 1 BY $1 M A APPLICATION FILED JAN. 9. 1911 WITNESSES: m, 5. ymflwk Y steam WILLIAM F. K'IESEL, JR., 0F ALTOONA, PENNSYLVANIA.

SUPERHEATER FOR STEAM-GENERATORS.

Application filed January 9, 1911.

Specification of Letters Patent.

Patented May 6, 1913.

Serial No. 601,566.

To all whom, it may concern Be it known that I, WILLIAM F. KIESEL, Jr., a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Su erheaters for Steam-Generators, of which t e followin is a specification.

This invention relates to improvements in superheaters adapted to be applied more particularly to locomotive boilers; and the object of my improvements is to provide a simple arrangement of the superheater parts which will create practically no increase in the weight of the boiler, or any necessary attention at round houses for maintenance or repair.

I attain my object by constructing the superheater and applying it to the boiler in the manner illustrated in the accompanying drawings, in which Figure 1 shows a longitudinal vertical section through a locomotiveboiler, forward of the firebox, with my superheater applied thereto; Fig. 2, a plan view of the super heater, detached from the boiler; Fig. 3, a transverse section on the line m--:v in Fig. 2, looking to the left; and Fig. 4', a similar section on the line g -y in Fig. 2, looking to the right, and showin also a portion of the front flue sheet a'n boiler shell.

Like numerals designate like parts in the several views.

The superheater consists of a shell, composed of a crown piece 1, sli htly convexed, and a bottom piece 2, of V- ape, the edges of which are riveted to the edges of the crown iece. The shell so formed is of a size su 'cient to inclose about one-fourth of the tubes, and extends from the front flue sheet of the boiler to within about one foot of the fire box flue sheet, where the flues pass through the end wall 3 of the shell, the flues at this point being expanded so as to produce practically a water-tight fit. At the forward end the shell is riveted to the front flue sheet 4, of the boiler. Saturated passes from the steam space of the boiler lnto the su erheater through a vertical conduit 5, w ich rests upon-a raised piece 6, riveted to the to piece 1 at the rear end of the shell, and 'orming a chamber into which an aperture 7, cut through the endof the top plece, opens. A assageway through the conduit is formed y an arch piece 8, and a longitudinal depression 9 in the piece 6; through which passageway the throttle rod 11 and the injector pipe 12 pass. On each side of the arch 8 apertures 10 are formed through which the steam asses from the conduit 5 into the chamber ormed by the piece 6. By this arrangement the conduit 5 is so positioned as to extend upward into the present standard dome of the boiler, so that the steam is taken into the superheater from the boiler at a oint where it will have least moisture. It Wlll be understood, of course, that this conduit may be so positioned as to take the steam from a point within the shell of the boiler, if it be desired to dispense with the dome; and that the conduit may be made of an desirable shape or dimensions. For the boiler herein shown, the opening into the top of the conduit is three inches by twentyone inches.

At the front of the boiler a steam space is formed by means of two longitudinal stay sheets 14 and a cross sheet,15, riveted to the barrel 20 of the boiler, to the front flue sheet, and to the top piece 1 of the superheater. A passageway through the top iece 1 at 13 adjacent the front flue sheet eads into this chamber. Within the chamber is located the throttle valve 16 from which the connection 17 leads to the cylinder branch pipes. This chamber takes the place of the dome in ordinary saturated steam boilers. A damper 18 is hinged above the tubes in the smoke box, and is so shaped as to cover the ends of the tubes which pass through the superheater when in closed position; any suitable means being provided for opening and closing this damper, which is not new in the art. The throttle rod 11 passes through the cross sheet 15, by way of a steam packed sleeve 19riveted to the sheet; and all seams and joints of the superheater shell, and its connections with the boiler shell, are riveted and calked so as to be practically watertight.

The 0 eration when usin this superheater Wlll be as follows: WV en the boiler is first fired up the damper 18 will be closed over the superheater tubes, and will remain closed until the locomotive is readyto be attached to a train, to prevent the overheating of the tubes in the superheater. The dam er will then be opened and remain open until the locomotive is detached from a train, or is put into the round house. When the locomotive is in service, steam will through of the gases of combustion from the firebox, until the forward end of the boiler .is reached, when the thoroughly dried and.

superheated-stem will rise through the passageway 13 into the throttle valve chamber, whence it will be delivered to the'cylinders by the opening of the throttle valve.

Among the advantages of my invention it may be stated that the triangular cross section of theshell of the superheater renders it adaptable to boilers of the type now in common use without materially ehanging their construction. The widely separated entrance openings 10 distribute the wet steam over the comparatively flat V-shaped bottom of the superheater and as it travels forward over the bottom plate it forms a steam film which acts as an insulator to prevent transference of heat from the tubes of the superheater to the water in the boiler. It will be noted that the side walls 14 of the throttle chamber serve to brace and strengthen the front flue sheet and also support the crown sheet of the superheaterfrom .the shell of the boiler.

The throttle valve, branch pipe, smoke box, stack, etc.,' are similar in arrangement to the same parts in the boilers of saturated steam locomotives, and the operation of the locomotive by the engineer is in no wise different, with the exception of the adjustment of the damper for covering the tubes which pass through the superheater.

What I claim as my invention'and desire tosecure by Letters Patent is 1. In a boiler of the locomotive type, the combination with the boiler shell and fire tubes, of a superheater chamber through which a plurality of the upper fire tubes pass, 'the upper wall of said super-heater chamber being arched and its lower wall being V-shaped in cross section and having an inlet opening at its rear end and a delivery opening near its for-ward end, a rear flue sheet for the superheater adjacent the fire box, a common flue sheet for the for ward end of the superheater and boiler, and spaced longitudinally extending bracing plates secured tothe top of the superheater,

the boiler shell and the forwardflue sheet.

2. In a boiler of the locomotive type, a

superheater chamber inclosing portions of the upper fire tubes of the boiler, a duct for transferring steam from the boiler to the rear end of the superheater, and a throttle chamber above the forward end of the superheater, the said throttle chamber having side walls connected respectively'to the shell of the boiler, the front flue sheet of the boiler and the top sheet ofthe superheater and serving to brace the flue sheet and support the superheater casing, substantially as and for the purpose set forth.) 4

In testimony whereof I have afiixed my signature, in presence of two witnesses.

Witnesses:

J. FosTER MEcK, J. C. STORM. 

